This new show is a thriller and will see Kat and Alfie looking for her long-lost son

One fan demanded an explanation from show producer Dominic Treadwell-Collins, tweeting: “How come @rteone are showing #Redwater 4 days before @BBCOne? Will spoil it for UK fans. Luke's identity & other twists will leak.”

Another said: “So unfair to millions of viewers in UK. Not saying we should get it first instead, just show it on the same day in UK & Ireland.”